As the FBI’s investigation into Hillary Clinton’s private email server continues, MSNBC’s “Morning Joe” panel discussed Friday the impact it could have on her presidential campaign.

Host Joe Scarborough shared that “for several months” he and co-host Mika Brzezinski have been hearing “the same thing” from “all of our sources high-up … that this investigation is far more advanced than the public knows.”

Bloomberg Politics Managing Editor Mark Halperin told Scarborough and Brzezinski that “there are three things people are keying off of” regarding the investigation.

“First of all, there’s a lot of chatter amongst FBI agents, many of whom have never been big fans of the Clintons,” he explained.

Second, he said, “from a legal point of view, some of the recent developments … it’s hard to see how the Justice Department, the FBI, doesn’t want to interview Secretary Clinton.”

Halperin said he believes “that interview alone, short of an indictment … would be a huge political development. It would undermine confidence in the notion of some Democrats going forward with Secretary Clinton.”

The third thing, he continued, is that “there are some people in the White House who are starting to talk about this.”

Halperin said though it is unclear to him whether White House officials know what is happening, but “the body language among some Obama Administration official is, ‘This is more serious, and something’s gonna happen.’”

He went on to say that if Clinton were indicted, “the timing of it could be, if not cataclysmic, pretty bad for Secretary Clinton.”

Scarborough said that he has been hearing from people in the Obama Administration and law enforcement “more and more that something may be coming down the road.”

ABC News political commentator Cokie Roberts also weighed in on the conversation, noting that Obama has become “more fulsome” in his support for Clinton recently. She said that in her view, “if an indictment were going to come down, that it would’ve happened sooner.”

But Roberts predicted that if an indictment does occur and Clinton is forced to drop out of the presidential race, Democrats will have to “break the glass in the emergency box” and summon Vice President Joe Biden.